%0 Conference Proceedings %T A Burma terrane related to India: Evidence from the U-Pbzircons in Late Cretaceous-Paleogene sediments from theMyanmar Central Basins %+ Géosciences Rennes (GR) %+ University of Potsdam = Universität Potsdam %A Roperch, Pierrick %A Westerweel, Jan %A Dupont-Nivet, Guillaume %A Cogné, Nathan %< avec comité de lecture %B 27 ème Réunion des sciences de la Terre (RST 2021) %C Lyon, France %3 Livre des résumés %P 230 %8 2021-11-01 %D 2021 %K Myanmar %K Tectonics %K sedimentation %Z Sciences of the Universe [physics]/Earth Sciences/Tectonics %Z Sciences of the Universe [physics]/Earth Sciences/GeochemistryConference papers %X Recent paleomagnetic data from Myanmar demonstrate that the Burma Terrane (BT)underwent an impressive northward translation alongside India in the Cenozoic(Westerweel et al., 2019, 10.1038/s41561-019-0443-2).Thick sedimentary basins, filled during the Cenozoic, characterize the geology of the BTand were first considered as the receptacle for the erosion products of the India-Asiacollision (Métivier et al., 1999; 10.1046/j.1365-246X.1999.00802.x). More local sourceshave however been proposed for the infill of the Eocene Myanmar basins oftenpresented as forearc and backarc basins of an Andean-type magmatic arc along thewestern margin of Sibumasu with uplifted parts of Eastern Myanmar e.g. MogokMetamorphics and Shan Plateau as additional sediment sources (Licht et al., 2013,10.1144/jgs2012-126, Licht et al. 2016, 10.1111/bre.12108; Cai et al., 2019,10.1046/j.1365-246X.1999.00802.x; Najman et al., 2020,10.1016/j.epsl.2019.115948). However, the Late Eocene equatorial position of the BTimplies that the Myanmar sedimentary basins were far away from a potential source ineastern Myanmar and challenges all these previous interpretations. We review thenumerous studies on detrital zircons (>5000 zircons) from the Late Cretaceous -Paleogene sediments of the Myanmar central basins. While the age spectrum isdominated by a mid-Cretaceous peak compatible with the main magmatic event alongthe Myanmar magmatic arc or the Gangdese arc, more than 40% of the zircons fromsediments of the Central Basins have pre-Cretaceous ages. There is a clear correlationin the distribution of these ages with those from the Triassic turbidites of the PaneChaung Fm. of the Indo-Burman ranges (Yao et al. 2017, 10.1016/j.tecto.2017.09.016)and the Triassic sediments from the Tethyan Himalaya. This observation clearlysupports a paleogeography where the Burma terrane is on the India plate and linked toGreater India during the Paleogene.The large northward motion of the BT likely also impeded active subduction belowMyanmar during the Paleogene. Filling of the BT sedimentary basins is clearlycontrolled by Cenozoic tectonics north of the BT due to the collision of India first withthe trans-Tethyan arc and then with Asia.Paleoenvironments of Myanmar need to be reinterpreted using the new paleogeography. %G English %L insu-03521118 %U https://insu.hal.science/insu-03521118 %~ INSU %~ UNIV-RENNES1 %~ UR2-HB %~ CNRS %~ GR %~ OSUR %~ UR1-HAL %~ UR1-SDLM %~ GR-PPDB %~ UNIV-RENNES2 %~ TEST-UR-CSS %~ UNIV-RENNES %~ INRAE %~ UR1-ENV %~ RST2021 %~ GR-P %~ GR-CHRONOS %~ TEST3-HALCNRS %~ TEST4-HALCNRS %~ TEST5-HALCNRS